Epidemiological Investigation of Microsporidiosis in Grouper in Hainan
Microsporidiosis of grouper is an important disease,which has caused serious economic losses to grouper culture industry.In order to understand the occurrence and prevalence of microsporidiosis in grouper in Hainan,a survey of microsporidiosis infection and prevalence was carried out in grouper farms and nursery farms in Wenchang,Qionghai,Lingshui,Danzhou and Dongfang from March 2021 to December 2022 by using the methods of fixed point monitoring and sampling detection in key culture areas.The detection results of 1 976 grouper samples showed that grouper microsporidiosis occurred in the 5 cities(counties).The incidence of microsporidiosis was 66.7%in nursery farms and 30.0%in breeding farms.The total infection rate of microsporidiosis in grouper samples was 40.7%.There was no significant difference in the infection rate of microsporidium among different sizes of grouper.The infection rates of small size grouper(3-12 cm)and large size grouper(≥16cm)were 40.3%and 50.6%,respectively.The infection rate of microsporidium in different species of grouper was significantly different(P<0.01).The infection rate of pearl grouper was as high as 73.6%,that of pine grou-per was 50.3%,that of blue grouper was 41.6%,that of red grouper was 18.1%,and that of leopard grouper had no micro-sporidium.The results showed that microsporidiosis was prevalent in cultured grouper in Hainan,especially in the fry,which posed a great threat to grouper culture.Effective measures should be taken to prevent and control microsporidiosis.
国家科技期刊平台
NSTL
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